ClinicalTrials.gg
CompletedNCT01425983asn01Updated Sep 7, 2015

Dietary Intervention of Stress-Induced Neurovegetative Disorders With a Specific Amino Acid Composition (asn01)

A Phase 3 interventional study of amino acid composition (asn01) and Placebo in Nervous System Disorder and Imbalance of Constituents of Food Intake, sponsored by Kyberg Vital GmbH. Completed at 1 site in Germany. Open to participants aged 18 Years to 65 Years. Per ClinicalTrials.gov, last updated 2015-09-07.

Sponsored by Kyberg Vital GmbH · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
80
Allocation
Randomized
Ages
18 Years to 65 Years
Sex
All
01

Study summary

Psychosocial stress leads to altered neuroendocrine functions, such as serotonergic dysfunction, as well as alterations of the autonomic nervous system and the hypothalamic-pituitary-adrenal (HPA) axis activity resulting in an imbalance between inhibitory and excitatory neurotransmitters. Clinical consequences include, inter alia, neurovegetative disorders, higher resting heart rate, hypertension, depressive symptoms, sleep disturbances, irregular body-weight changes, and insulin resistance. Poor dietary intake of the essential amino acid L-tryptophane as a precursor to 5-hydroxytryptamine (HT, serotonin) increases sensitivity to stress.

It is therefore the investigators hypothesis that daily oral administration of an amino acid mixture (dosage 3.8 g/day) with micronutrients specifically designed to decrease neurovegetative disorders will target these neuroendocrine and metabolic alterations in adults with psychosocial stress. The principal endpoints will be a decrease in points in the psychological-neurological questionnaire (PNF).

02

Conditions studied

  • Nervous System Disorder
  • Imbalance of Constituents of Food Intake

Keywords

  • stress
  • lability and irritative disturbances
  • dietary supplement
  • amino acid composition
  • psychological neurological questionnaire (PNF)
03

In context

Nervous System Diseases

985 studies on the registry are indexed under Nervous System Diseases; 251 are open to participants now.

This study's enrollment of 80 is above the median of 48 across 629 interventional studies indexed under Nervous System Diseases.

Browse Nervous System Diseases studies →

Lead sponsor

Kyberg Vital GmbH is the lead sponsor of 2 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 65 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Age: 18-65 Years
  • Psychological-Neurological Questionnaire (PNF): 30 - 50 Points

Exclusion criteria

Exclusion Criteria:

  • Age: \< 18 and > 65 Years
  • Psychological neurological questionnaire (PNF): \< 30 and > 50 Points
  • Resting heart rate: \< 70/min
  • Supplementation with dietary supplements or drugs which contains amino acids, vitamins and other micronutrients
  • Therapy with antipsychotic drugs such as tranquilizer, antidepressants
  • acute and chronic diarrhea
  • Psychological-neurological or psychiatric therapy
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
80 participants (actual)

Study arms

  • Active comparator
    amino acid composition (asn01)

    Dietary supplement: specific amino acid composition with micronutrients

    Dietary Supplement: amino acid composition (asn01)

  • Placebo comparator
    Sugar powder

    Placebo contains no amino acids and no micronutrients and is identical in appearance and solution properties.

    Other: Placebo

Interventions

  • Dietary supplementamino acid composition (asn01)

    Amino acid composition with micronutrients, once a day (in the evening, 2 hours after dinner) content of a sachet mixed with 200 ml water. Duration: 12 weeks

    Also known as: Brand name: aminoplus neurostress

  • OtherPlacebo

    Placebo; once a day (in the evening, 2 hours after dinner) content of a sachet mixed with 200 ml water. Placebo contains no amino acids and micronutrients and is identical in appearance and solution properties. Duration: 12 weeks

06

What researchers measure

Primary outcomes

  1. Psychological neurological questionnaire (PNF)

    Pre-post intervention changes in total number of points PNF

    Time frame: 12-week dietary intervention

Secondary outcomes

  1. Psychological neurological questionnaire (PNF)

    Pre-post improvement in total number of points from the psychological-neurological questionnaire (PNF) about 10 Points or more

    Time frame: 12-week dietary intervention

  2. Salivary cortisol concentration (30 minutes after waking in the morning)

    Absolute difference between cortisol concentration at baseline and 12 weeks

    Time frame: 12-week dietary intervention

  3. Salivary cortisol concentration (in the evening between 8 and 10 pm, 2 hours after dinner)

    Absolute difference between cortisol concentration at baseline and 12 weeks

    Time frame: 12-week dietary intervention

  4. Serotonin concentration in blood

    Absolute difference between serotonin concentration at baseline and 12 weeks

    Time frame: 12-week dietary intervention

07

Study locations

1 site
  • Cardiological Outpatient Practice Elke Parsi, MD
    Berlin, State of Berlin 13053, Germany
08

References and documents

Publications

  • Chaborski K, Bitterlich N, Alteheld B, Parsi E, Metzner C. Placebo-controlled dietary intervention of stress-induced neurovegetative disorders with a specific amino acid composition: a pilot-study. Nutr J. 2015 May 6;14:43. doi: 10.1186/s12937-015-0030-3. PubMed 25943490 ↗
09

Timeline

Tracking since Sep 25, 2026
Not marked actual or estimatedDates not marked actual or estimated

The record gives a start of Mar 2011, a primary completion of May 2012 and a completion of Jun 2012. It does not say whether these dates are actual or estimated.

How these figures are worked out, and which studies are left out of them.

Registered
Aug 26, 2011
First posted
Aug 30, 2011
Start
Mar 2011
Primary completionActual
May 2012
CompletionActual
Jun 2012
Last update
Sep 7, 2015
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Sep 7, 2015, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT01425983
Lead sponsor
Kyberg Vital GmbH
Responsible party
Doris Meister (Doris Meister, Sponsor-Investigator, Kyberg Vital GmbH) — Principal investigator
First posted
Aug 30, 2011
Start date
Mar 2011
Primary completion
May 2012
Completion
Jun 2012
Last update
Sep 7, 2015

Study contacts

Christine Metzner, Professor MD
principal investigator · Bonn Education Association for Dietetics r.A., Cologne, Germany

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Sep 2015. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion